[%c_effect e1;square;e1;type;Interesting;persistent;true] A subtle move. In addition to taking the knight out of the pin, White has another idea that will soon be revealed.
5... d8c7 This is played in order to prevent White from developing the bishop on f4. 6. g1e2  6... c8g4  7. e1g1  7... e7e6 